By converting the waste line to a soil line and increase the existing piping from 2" to a minimum of 3"
Yes,the toilet is part of the plumbing system.
By plumbing codes, no.
You have to take the floor apart and reduce the piping to 2". You also have to install a p-trap as there are NEVER p-traps under toilets. All p-traps are BUILT into toilets!!!
Toilet parts
Plumbing or Hardware store
You can in most countries except those that have weak plumbing
plumbing service
follow the drainage back till u meet with a 3" pipe, extend the 3" pipe back to where u would like the toilet instaled. with in 3-5 of the toilet arm tie in a 2 line and install a lav. Toilets require a wet vent ( which is a drain used by another fixture ) This will allow proper flow of the toilet and also help wash out the line this is no job for a do it ur self kinda guy. call a pro PLUMBER @ IN UR TOWN PLUMBING & HEATING GREATER VANCOUVER BC 778-829-1448
Flooding.
Any plumbing supply that sells fixtures
Vitreous china, rubber and plastic.
the plumbing drain vent is not installed or poorly installed.